Introduction - If you have any usage issues, please Google them yourself
Write a student information management system, mainly used to manage students'basic letters
(1) Input student information (student number, name, 3 grades).
(2) Calculating the student's total score (requiring input of a student number and output of the student's total score)
(3) Display the information of the top three students in the general evaluation
(4) Display the information of the failed students (show all the information of the students whose total score is below 60)
(5) Display average performance
(6) Withdrawal from the system